National Weather Service United States Department of Commerce

Severe weather possible for parts of eastern, north-central and southwestern U.S.

The NWS Storm Prediction Center is forecasting a risk of severe thunderstorms Tuesday afternoon across a large portion of the eastern U.S. from the Mid-Atlantic & Ohio Valley into the Deep South. Severe thunderstorms are also possible across parts of the northern Plains & southern Ariz. Damaging wind gusts & large hail will be the main threats with severe thunderstorms that develop in these areas.
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Short Range Forecasts

Short range forecast products depicting pressure patterns, circulation centers and fronts, and types and extent of precipitation.

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Medium Range Forecasts

Medium range forecast products depicting pressure patterns and circulation centers and fronts

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Precipitation Amounts

Quantitative precipitation forecasts.

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Surface Analysis

Highs, lows, fronts, troughs, outflow boundaries, squall lines, drylines for much of North America, the Western Atlantic and Eastern Pacific oceans, and the Gulf of Mexico.

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Temperature

Maximum daytime or minimum overnight temperature in degrees Fahrenheit. 

Predominant Weather

Expected weather (precipitating or non-precipitating) valid at the indicated hour.  The weather element includes type, probability, and intensity information. 

Wind Speed and Direction

Sustained wind speed (in knots) and expected wind direction (using 36 points of a compass) forecasts. 

Chance of Precipitation

Likelihood, expressed as a percent, of a measurable precipitation event (1/100th of an inch).

Precipitation Amount

Total amount of expected liquid precipitation.

Sky Cover

Expected amount of opaque clouds (in percent) covering the sky.

Alaska Graphical Forecasts

Graphical forecasts from the National Digital Forecast Database for Alaska.

Hawaii Graphical Forecasts

Graphical forecasts from the National Digital Forecast Database for Hawaii.

Puerto Rico Graphical Forecasts

Graphical forecasts from the National Digital Forecast Database for Puerto Rico and Virgin Islands.